82109868 has 48 divisors (see below), whose sum is σ = 203521920. Its totient is φ = 25691904.

The previous prime is 82109857. The next prime is 82109873. The reversal of 82109868 is 86890128.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24171 + ... + 27357.

It is an arithmetic number, because the mean of its divisors is an integer number (4240040).

Almost surely, 2^82109868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82109868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101760960).

82109868 is an abundant number, since it is smaller than the sum of its proper divisors (121412052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82109868 is a wasteful number, since it uses less digits than its factorization.

82109868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 82109868 is about 9061.4495529137. The cubic root of 82109868 is about 434.6420942968.

The spelling of 82109868 in words is "eighty-two million, one hundred nine thousand, eight hundred sixty-eight".